fix compat breaking: revive workaround padding in decode() #3119

Job	Run time
shellcheck	11s
actionlint	13s
build-and-test-java-api (windows-latest)	6m 9s
build-and-test-python-api (windows-latest)	6m 35s
build-and-test-java-api (macos-latest)	2m 34s
build-and-test-python-api (macos-latest)	3m 4s
build-and-test-java-api (ubuntu-latest)	2m 39s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	1m 28s
build-and-test-python-api (ubuntu-latest)	3m 5s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 52s
build-windows-cpp-example	4m 24s
c-header	43s
rust-integration-test-strategy-matrix	1s
rust-lint	4m 20s
rust-unit-test	5m 14s
validate-cargo-lock	22s
rust-integration-test (macos-12)	2m 23s
rust-integration-test (ubuntu-20.04)	1m 23s
	46m 40s

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