ci: run integration tests with MongoDB v8; remove MongoDB v5 from tes… #135

Job	Run time
deploy::binary	3m 48s
build the CLI binaries (ubuntu-latest, x86_64-unknown-linux-musl, -C target-feature=+crt-static, ...	1m 12s
connector-definition	0s
build the CLI binaries (ubuntu-latest, aarch64-unknown-linux-musl, -C target-feature=+crt-static,...	1m 22s
build the CLI binaries (macos-latest, x86_64-apple-darwin)	1m 44s
build the CLI binaries (macos-latest, aarch64-apple-darwin)	1m 29s
build the CLI binaries (windows-latest, x86_64-pc-windows-msvc, -C target-feature=+crt-static, .exe)	3m 57s
deploy::docker	4m 3s
release to GitHub	0s
	17m 35s

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