Feat: Add support for deleting code scanning alerts by looping through all analyses and deleting them

[felickz]

Ex:

• https://gist.github.com/ctcampbell/a73bf1fa482e12f385f3dcc8e22ef823
• https://github.com/thedave42/github-tools/blob/main/GHAS/rm-r-analysis.sh

[mario-campos]

This is already possible I think:

gh code-scanning analyses --delete owner/repo