generate auto imports for core callables

[sezna]

Closes #1860

Currently, we have a separate code path for generating completions for core callables. This code path just hard-codes the callables to
not include any auto-generated imports. This may have been necessary at some point, but it no longer is and it is preventing us from generating
the correct auto-imports for QIR.Runtime. We now have a function that generates completions from a package and is aware of if imports are
needed or not, so I just went ahead and used that instead of special casing Core.

This PR:

• Uses the standard completion codepath to generate completions for Core
• Adds the ability to unit test completions with the real stdlib, not just the fake stdlib
• Adds tests to ensure auto-imports are generated for items that are not already in scope (e.g. QIR.Runtime.*) and are not generated for items already
  in scope (e.g. Length).

[github-actions]

Benchmark for 5f0ee5a

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Test	Base	PR	%
Array append evaluation	342.3±6.26µs	337.8±2.62µs	-1.31%
Array literal evaluation	169.7±6.33µs	186.5±3.03µs	+9.90%
Array update evaluation	418.4±3.30µs	413.9±2.36µs	-1.08%
Core + Standard library compilation	23.8±0.87ms	23.5±0.85ms	-1.26%
Deutsch-Jozsa evaluation	5.0±0.05ms	5.0±0.07ms	0.00%
Large file parity evaluation	34.2±0.11ms	34.4±0.78ms	+0.58%
Large input file compilation	14.6±0.47ms	14.8±0.44ms	+1.37%
Large input file compilation (interpreter)	55.5±2.03ms	56.2±2.23ms	+1.26%
Large nested iteration	32.9±0.15ms	32.6±0.13ms	-0.91%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1574.8±58.97µs	1577.2±103.36µs	+0.15%
Perform Runtime Capabilities Analysis (RCA) on large file sample	8.0±0.12ms	8.0±0.16ms	0.00%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1445.1±115.17µs	1429.9±39.11µs	-1.05%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	28.0±0.31ms	28.0±0.28ms	0.00%
Teleport evaluation	92.9±3.45µs	93.0±3.47µs	+0.11%

[github-actions]

Benchmark for 13bae1f

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Test	Base	PR	%
Array append evaluation	336.9±2.27µs	339.1±2.10µs	+0.65%
Array literal evaluation	185.9±0.72µs	168.8±1.01µs	-9.20%
Array update evaluation	414.3±2.28µs	418.2±6.65µs	+0.94%
Core + Standard library compilation	23.1±0.99ms	22.7±0.75ms	-1.73%
Deutsch-Jozsa evaluation	5.0±0.06ms	5.0±0.06ms	0.00%
Large file parity evaluation	34.3±0.13ms	34.5±0.94ms	+0.58%
Large input file compilation	14.1±0.27ms	14.5±0.49ms	+2.84%
Large input file compilation (interpreter)	56.9±1.80ms	53.5±1.42ms	-5.98%
Large nested iteration	32.8±0.38ms	32.7±0.18ms	-0.30%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1561.0±41.68µs	1571.8±47.70µs	+0.69%
Perform Runtime Capabilities Analysis (RCA) on large file sample	7.9±0.16ms	7.9±0.12ms	0.00%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1429.2±35.30µs	1433.2±51.50µs	+0.28%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	27.9±0.33ms	27.8±0.33ms	-0.36%
Teleport evaluation	94.8±3.47µs	94.9±4.38µs	+0.11%

[github-actions]

Benchmark for fad84d1

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Test	Base	PR	%
Array append evaluation	355.7±38.62µs	338.8±8.00µs	-4.75%
Array literal evaluation	169.6±1.15µs	169.2±1.92µs	-0.24%
Array update evaluation	432.2±21.72µs	416.0±2.56µs	-3.75%
Core + Standard library compilation	23.8±1.29ms	24.1±1.04ms	+1.26%
Deutsch-Jozsa evaluation	5.0±0.07ms	5.0±0.05ms	0.00%
Large file parity evaluation	34.5±0.22ms	34.2±0.13ms	-0.87%
Large input file compilation	14.6±0.30ms	14.3±0.25ms	-2.05%
Large input file compilation (interpreter)	56.8±1.94ms	55.4±1.73ms	-2.46%
Large nested iteration	32.8±0.30ms	33.0±2.54ms	+0.61%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1578.6±46.94µs	1600.8±131.63µs	+1.41%
Perform Runtime Capabilities Analysis (RCA) on large file sample	8.0±0.11ms	8.1±0.17ms	+1.25%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1442.9±60.01µs	1454.9±102.88µs	+0.83%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	28.0±0.26ms	28.2±0.49ms	+0.71%
Teleport evaluation	95.2±10.05µs	93.7±3.14µs	-1.58%

[github-actions]

Benchmark for 6c9bedb

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Test	Base	PR	%
Array append evaluation	338.6±5.14µs	340.5±7.39µs	+0.56%
Array literal evaluation	185.8±1.70µs	186.0±2.12µs	+0.11%
Array update evaluation	417.3±12.95µs	416.7±3.80µs	-0.14%
Core + Standard library compilation	23.8±0.76ms	24.5±1.09ms	+2.94%
Deutsch-Jozsa evaluation	4.9±0.06ms	4.9±0.06ms	0.00%
Large file parity evaluation	34.9±0.21ms	35.0±0.40ms	+0.29%
Large input file compilation	14.9±0.67ms	15.2±0.84ms	+2.01%
Large input file compilation (interpreter)	56.6±1.99ms	57.2±2.11ms	+1.06%
Large nested iteration	32.7±0.15ms	32.9±0.20ms	+0.61%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1596.6±103.38µs	1595.5±89.07µs	-0.07%
Perform Runtime Capabilities Analysis (RCA) on large file sample	8.2±0.17ms	8.1±0.15ms	-1.22%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1459.0±128.44µs	1446.2±62.88µs	-0.88%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	28.2±0.31ms	28.5±2.04ms	+1.06%
Teleport evaluation	93.0±4.33µs	92.9±3.39µs	-0.11%