Make near-sandbox fully cross-platform

[chadoh]

• Every nearcore release automatically creates binaries and tarballs for all OS & architecture combinations (intel Macs, M1 macs, every common Linux variant, Windows)
• Tarballs are distributed via Release pages in nearcore
• near-sandbox npm package automatically downloads these tarballs

[willemneal]

See issue here for builds: https://github.com/near/near-ops/issues/575

[jberrytech]

Sprint planning update: Bowen looking into M1 LOE. Sandi will be helping with all other images as part of cross-functional OKRs for Q4.

[volovyks]

@bowenwang1996 @chefsale
Any updates on this?

[volovyks]

@ChaoticTempest looks like most of the things mentioned in this issue are already done. Except for Windows support. Can we close it in favor of #36 and #49?

[ChaoticTempest]

@volovyks I feel like we can leave this open so it references the last two tickets before cross-platform is fully supported