[WIP] Make PRIMARY a non-reserved keyword

[tdcmeehan]

Description

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Impact

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• Please make sure your submission complies with our development, formatting, commit message, and attribution guidelines.
• PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
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== RELEASE NOTES ==

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[github-actions]

Codenotify: Notifying subscribers in CODENOTIFY files for diff 21340d8...b94c2c5.

Notify	File(s)
@aditi-pandit	presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4
@elharo	presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4
@kaikalur	presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4
@rschlussel	presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4
@steveburnett	presto-docs/src/main/sphinx/language/reserved.rst

[steveburnett]

LGTM! (docs)
Pull branch, new local build, everything looks good.

[tdcmeehan]

Closed in favor of #22115