chore: update kong/gopher-lua with latest changes from upstream

[mikefero]

The embeded-lua-filesystem branch was rebased against the latest changes since yuin/gopher-lua@3323424 through yuin/gopher-lua@2b3f02d.

Changelog

• Merge pull request fix: fix os.date("!*t", os.time()) will not get UTC date time issue yuin/gopher-lua#433 from ttys3/fix-utc-date-format
• Revert "test: rollback to use env default TZ variable"
• test: rollback to use env default TZ variable
• Merge pull request Convert string math params to number instead of failing with error yuin/gopher-lua#425 from mdogan/master
• Merge pull request Fix lua coroutine context leak yuin/gopher-lua#438 from deflinhec/bugfix/coroutine-context-leak
• Fix lua coroutine context leak
• fix: fix os.date("!*t", os.time()) will not get UTC date time issue
• Merge pull request Write trunc yuin/gopher-lua#427 from waschik/write-trunc
• Add test for file writing
• Use O_TRUNC for files opened with "w"
• Convert math params to number instead of failing with error
• Fix 1.0.0 Comparing 'string' with number, but old gopher-lua printed a proper number after tonumber syntax yuin/gopher-lua#423
• Update README.rst
• Update README.rst
• Add 'goto' statement
• Migrate to Github Actions
• Migrate to Github Actions
• Migrate to Github Actions
• Migrate to Github Actions
• Fix Bug: Incorrect result for multi-assignment yuin/gopher-lua#315
• Fix Variable re-assignment using same declared and initialized variable is always nil in certain ternary style operations yuin/gopher-lua#355

Note: The last fix in the changelog was identified by us in yuin/gopher-lua#355; which means we could look into removing our "fix" from the Lua patches.