Snowflake auto increments fixes

[myschkyna]

Brief summary of the change made

Fixes #1619. The NumericLiteralValue was referred to by Grammar. This was however non existent. Replacing this with the NumericLiteralSegment fixed the issue.

Are there any other side effects of this change that we should be aware of?

Not that I'm aware of.

Pull Request checklist

• Please confirm you have completed any of the necessary steps below.

[tunetheweb]

Oops - think that was me!

[myschkyna]

@tunetheweb, I see that the Windows tests are failing. Is this something I can fix, or is it still related to GitHub Actions?

[tunetheweb]

It's the GitHub Actions issue: https://www.githubstatus.com/

[codecov]

Codecov Report

Merging #1620 (5fa03a2) into main (0ebc703) will not change coverage.
The diff coverage is n/a.

❗ Current head 5fa03a2 differs from pull request most recent head 55a9dfe. Consider uploading reports for the commit 55a9dfe to get more accurate results

@@            Coverage Diff            @@
##              main     #1620   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          131       131           
  Lines         9207      9208    +1     
=========================================
+ Hits          9207      9208    +1     

Impacted Files	Coverage Δ
src/sqlfluff/dialects/dialect_snowflake.py	100.00% <ø> (ø)
src/sqlfluff/dialects/dialect_tsql.py	100.00% <0.00%> (ø)

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[tunetheweb]

@myschkyna can you update the branch so we can merge this?

[myschkyna]

Done @tunetheweb!

[tunetheweb]

Cool will merge when tests complete.

BTW if you tick this box when opening PRs we can update this for you:

[myschkyna]

Cool, didn't know that! Thanks!