Add functionality to call the EngineStateReport via the newly introduced Manager method

[mulkieran]

We might want to continue to do this under the report submenu.

Currently the man pages claim that all the reports are unsupported, we could change that to start a list of supported reports.
And we would invoke that report via the dedicated D-Bus API method.

[mulkieran]

Things to do:

• Update introspection data; probably best to copy it from associated PR stratis-storage/stratisd#2371.
• Insert calls to new Manager.r4 method instead of call to the Report interface method for engine_state_report. The code for this is somewhere in the actions subdirectory.
• Adjust command-line parser definition so that passing no arguments to the "report" sub-command gives the engine_state_report, i.e., make that report the default.
• Update man page to discuss supported reports and list the one report that is supported.
• Update blackbox tests as appropriate.
• Possibly update integration tests as well, but this may not be necessary.

[lleshchi]

Things to do:

• Update introspection data; probably best to copy it from associated PR stratis-storage/stratisd#2371.
• Insert calls to new Manager.r4 method instead of call to the Report interface method for engine_state_report. The code for this is somewhere in the actions subdirectory.
• Adjust command-line parser definition so that passing no arguments to the "report" sub-command gives the engine_state_report, i.e., make that report the default.
• Update man page to discuss supported reports and list the one report that is supported.
• Update blackbox tests as appropriate.
• Possibly update integration tests as well, but this may not be necessary.

@mulkieran I somehow did not see this comment and rather than alter the parser definition, I adjusted the get_report method in _top_actions to call the correct dbus method based on the report name provided. Would adjusting the parser be more optimal? https://github.com/lleshchi/stratis-cli/tree/engine_state_report