Add experimental `spin up --component` flag to run a subset of app components #6697

Job	Run time
Build Spin Ubuntu	21m 47s
Build Spin static (aarch64, aarch64-unknown-linux-musl)	16m 7s
all-integration-tests	23m 24s
Build Spin static (amd64, x86_64-unknown-linux-musl)	15m 26s
Build Spin (windows-latest)	47m 50s
Review new dependencies for known vulnerabilities	7s
Build Spin (macos-13)	44m 53s
Lint Rust	9m 37s
Run release build steps (ubuntu-20.04, amd64, --features openssl/vendored, target/release)	14m 52s
Build Spin (macos-14)	19m 17s
Run release build steps (ubuntu-20.04, aarch64, --features openssl/vendored --target aarch64-unkn...	15m 35s
Test Spin (ubuntu-22.04-4core-spin)	15m 10s
Run release build steps (macos-13, amd64, target/release)	33m 32s
Test Spin (macos-14)	29m 10s
Run release build steps (macos-14, aarch64, target/release)	13m 4s
Run release build steps (windows-latest, amd64, .exe, target/release)	26m 34s
	5h 46m 25s

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