cargo vendor 🚚 on - Update bitflags to 2.4 Summary: ## Motivation Since the latest compiler update, we are getting `clippy::bad_bit_mask` errors at the callsites of `bitflags!` macros where one of the variant is zero. [Upstream won't address it in the `1.x` branch](https://github.com/bitflags/bitflags/pull/373) and recommends upgrading to the `2.x` branch. We are very close to reaching zero clippy lints in [Mononoke and other servers](https://fburl.com/code/pd76yn5e), which would feel nice. ##... #88

	on:
	push:
	branches:
	- main
	name: cargo vendor and commit
	run-name: cargo vendor 🚚 on - ${{ github.event.head_commit.message }}
	jobs:
	cargo_vendor:
	runs-on: ubuntu-latest
	steps:
	- name: Delete release branch
	uses: dawidd6/action-delete-branch@v3
	with:
	soft_fail: true # set to true so that if the branch doesn't exist action doesnt fail
	branches: release
	- uses: actions/checkout@v2
	- uses: dtolnay/rust-toolchain@stable
	- run: cargo vendor vendor_external
	- name: Create .cargo dir
	run: \|
	mkdir -p .cargo
	- name: Create cargo config
	shell: bash
	run: \|
	cat << EOF > .cargo/config.toml
	[source.crates-io]
	replace-with = "vendored-sources"

	[source.vendored-sources]
	directory = "vendor_external"
	EOF
	- name: commit to 'new' release branch
	uses: EndBug/add-and-commit@v9.1.1
	with:
	new_branch: release
	author_name: GitHub Action
	author_email: action@github.com

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