feat(init): add --checkout option to sam init command for specifying git branch, tag, or commit for cookiecutter projects#9045

MustafizSaadi wants to merge 6 commits into

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MustafizSaadi:3555-add-checkout-flag-for-sam-init-commandMustafizSaadi/aws-sam-cli:3555-add-checkout-flag-for-sam-init-commandCopy head branch name to clipboard