Map suppression names for irql-function-not-annotated

[smowton]

As noted at github/codeql#20611 the suppression query doesn't currently accept the warning code for query irql-function-not-annotated.

Two related pieces of feedback--

1. The help page at https://learn.microsoft.com/en-us/windows-hardware/drivers/devtest/static-tools-and-codeql?tabs=whcp%2Clatest#suppressing-codeql-results uses incorrect syntax #pragma(suppress:the-rule-id-here) -- should be #pragma prefast(suppress:the-rule-id-here) or #pragma warning(suppress:the-rule-id-here)

2. The regex used to recognise these pragmas is quite brittle; consider accepting spaces between prefast or warning and the parenthesis, so as to recognise e.g. #pragma warning (suppress:the-rule-id-here)

Checklist for Pull Requests

• Description is filled out.
• Only one query or related query group is in this pull request.
• The version number on changed queries has been increased via the @version comment in the file header.
• All unit tests have been run: (Test README.md).
• Commands codeql database create and codeql database analyze have completed successfully.
• A .qhelp file has been added for any new queries or updated if changes have been made to an existing query.