Extend and use BashJavaUtils to start JM JVM process and pass JVM memory args

Currently, the legacy options `jobmanager.heap.size` (or `jobmanager.heap.mb`) is used in JM standalone bash scripts to pass JVM heap size arg and start JM JVM process.

BashJavaUtils should be extended to get JVM memory arg list string from Flink configuration. BashJavaUtils can use JobManagerProcessUtils#processSpecFromConfig to obtain JobManagerProcessSpec. JobManagerProcessSpec can be passed to ProcessMemoryUtils#generateJvmParametersStr to get JVM memory arg list string.

The configuration should be fixed to fallback to JobManagerOptions.JVM_HEAP_MEMORY if a legacy option is set (JobManagerProcessUtils#getConfigurationWithLegacyHeapSizeMappedToNewConfigOption) before passing it to JobManagerProcessUtils#processSpecFromConfig.

Then the JVM memory arg list from BashJavaUtils can be used in JM standalone bash scripts instead the existing bash code which parses legacy heap options: `jobmanager.heap.size` (or `jobmanager.heap.mb`).