Detailed error message for execli errors

[liron-l]

Description

Include full fault details in error message, otherwise we get

EsxCLI.CLIFault.summary

And cannot diagnose the SDK errors

Closes: #3073

Type of change

Please mark options that are relevant:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• This change requires a documentation update
• Build related change

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. If applicable, please also list any relevant
details for your test configuration.

• Test Description 1
  Verified fix against live environment that returns the error for objects that are not found
• Test Description 2

Checklist:

• My code follows the CONTRIBUTION
  guidelines of
  this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

[vmwclabot]

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[dougm]

Thanks @liron-l , change looks good. Can you update the commit message to something like:

govc: add detail error message for host.esxcli commands

Closes #3073

Mainly the govc: prefix and issue reference, which is used for the generated ChangeLog: https://github.com/vmware/govmomi/blob/main/CONTRIBUTING.md#format-of-the-commit-message

[vmwclabot]

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[liron-l]

@dougm done, can we merge?

[dougm]

Thanks @liron-l !

[vmwclabot]

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