[1/4] Move methods under the redfishwrapper for reuse

[joelrebel]

What does this PR implement/change/remove?

• Moves the Inventory, Power*, GetBiosConfiguration methods under the redfishwrapper package for re-use by other providers.
• A few fixes for the bmc/firmware interface methods - to collect errors in the client metadata obj.

This is to allow each vendor/OEM provider to re-use and extend these methods.

Checklist

• [ ] Tests added
• [X] Similar commits squashed

[joelrebel]

All OK but test and lint fail

@ofaurax this is 1/4 PR, the 4th PR https://github.com/bmc-toolbox/bmclib/pull/372 when merged will clear tests and linting

[codecov[bot]]

Codecov Report

Attention: 226 lines in your changes are missing coverage. Please review.

Comparison is base (b565dd4) 44.60% compared to head (ee0f228) 43.87%.

Files	Patch %	Lines
providers/dell/firmware.go	9.34%	96 Missing and 1 partial :warning:
internal/redfishwrapper/inventory.go	11.76%	45 Missing :warning:
internal/redfishwrapper/inventory_collect.go	10.34%	26 Missing :warning:
providers/supermicro/supermicro.go	30.43%	14 Missing and 2 partials :warning:
internal/redfishwrapper/power.go	0.00%	14 Missing :warning:
client.go	0.00%	7 Missing :warning:
internal/redfishwrapper/task.go	76.19%	3 Missing and 2 partials :warning:
providers/redfish/redfish.go	0.00%	5 Missing :warning:
providers/dell/idrac.go	69.23%	4 Missing :warning:
internal/redfishwrapper/system.go	40.00%	3 Missing :warning:
... and 3 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## devel-rework-redfishwrapper #369 +/- ## =============================================================== - Coverage 44.60% 43.87% -0.74% =============================================================== Files 61 59 -2 Lines 5206 5042 -164 =============================================================== - Hits 2322 2212 -110 + Misses 2628 2608 -20 + Partials 256 222 -34 ```

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