Adds session binders

[johnedquinn]

Relevant Issues

• None

Description

• Small PR to update the default binders for CURRENT_USER and CURRENT_DATE.
• Now, SELECT CURRENT_USER previously normalized to SELECT CURRENT_USER AS "_1", but now, it normalized to: SELECT CURRENT_USER AS "CURRENT_USER"

Other Information

• Updated Unreleased Section in CHANGELOG: [YES/NO]

  • No, not to main.

• Any backward-incompatible changes? [YES/NO]

  • No

• Any new external dependencies? [YES/NO]

  • No

• Do your changes comply with the Contributing Guidelines
  and Code Style Guidelines? YES

License Information

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

Conformance comparison report

	Base (9e151c2)	91cad2d	+/-
% Passing	92.33%	92.33%	0.00%
✅ Passing	5372	5372	0
❌ Failing	446	446	0
🔶 Ignored	0	0	0
Total Tests	5818	5818	0

Number passing in both: 5372

Number failing in both: 446

Number passing in Base (9e151c2) but now fail: 0

Number failing in Base (9e151c2) but now pass: 0