fix: improve error message for plugin

[JeyJeyGao]

Resolves #867 Signed-off-by: Junjie Gao junjiegao@microsoft.com

[codecov-commenter]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (ee72394) 65.14% compared to head (b2e8418) 64.93%.

Files	Patch %	Lines
cmd/notation/plugin/install.go	25.00%	4 Missing and 2 partials :warning:
cmd/notation/plugin/list.go	0.00%	5 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #870 +/- ## ========================================== - Coverage 65.14% 64.93% -0.22% ========================================== Files 45 45 Lines 2717 2729 +12 ========================================== + Hits 1770 1772 +2 - Misses 787 795 +8 - Partials 160 162 +2 ```

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[Two-Hearts]

When running command on a malformed plugin executable file on Windows: ./notation.exe plugin install --file ./malformed-plugin/azure-kv/notation-azure-kv.exe, the command returns following error message:

Error: plugin installation failed: failed to get metadata of new plugin: failed to execute the get-plugin-metadata command for plugin azure-kv: fork/exec ./malformed-plugin/azure-kv/notation-azure-kv.exe: This version of %1 is not compatible with the version of Windows you're running. Check your computer's system information and then contact the software publisher..
Please ensure the plugin is executable and meet the installation requirements on the windows/amd64.

On linux:

Error: plugin installation failed: failed to get metadata of new plugin: failed to execute the get-plugin-metadata command for plugin azure-kv: fork/exec test-plugin/malformed-plugin/azure-kv/notation-azure-kv: exec format error.
Please ensure the plugin is executable and meet the installation requirements on the linux/amd64.

These error messages are quite verbose though, can we improve them? (contents starting with fork/exec are already in the DEBUG log)

[JeyJeyGao]

When running command on a malformed plugin executable file on Windows: ./notation.exe plugin install --file ./malformed-plugin/azure-kv/notation-azure-kv.exe, the command returns following error message:

Error: plugin installation failed: failed to get metadata of new plugin: failed to execute the get-plugin-metadata command for plugin azure-kv: fork/exec ./malformed-plugin/azure-kv/notation-azure-kv.exe: This version of %1 is not compatible with the version of Windows you're running. Check your computer's system information and then contact the software publisher..
Please ensure the plugin is executable and meet the installation requirements on the windows/amd64.

On linux:

Error: plugin installation failed: failed to get metadata of new plugin: failed to execute the get-plugin-metadata command for plugin azure-kv: fork/exec test-plugin/malformed-plugin/azure-kv/notation-azure-kv: exec format error.
Please ensure the plugin is executable and meet the installation requirements on the linux/amd64.

These error messages are quite verbose though, can we improve them? (contents starting with fork/exec are already in the DEBUG log)

Updated to:

./bin/notation plugin install --file ~/download/notation-azure-kv_1.0.1_darwin_amd64.tar.gz -d
DEBU[2024-01-18T12:55:26+08:00] Extracting file notation-azure-kv...         
DEBU[2024-01-18T12:55:26+08:00] Extracting file LICENSE...                   
DEBU[2024-01-18T12:55:26+08:00] Installing plugin from plugin path /tmp/notation-plugin2182206927 
DEBU[2024-01-18T12:55:26+08:00] Plugin get-plugin-metadata request: {}       
ERRO[2024-01-18T12:55:26+08:00] plugin get-plugin-metadata execution status: fork/exec /tmp/notation-plugin2182206927/notation-azure-kv: exec format error 
Error: plugin installation failed: failed to get metadata of new plugin: failed to execute the get-plugin-metadata command for plugin azure-kv.
Please ensure the plugin is executable and meet the installation requirements on the linux/amd64.