✨ Refactor context for vspheremachine controller

[Ankitasw]

What this PR does / why we need it:

Refactor context for vspheremachine_controller.go. Please find more background in #2295

Which issue(s) this PR fixes (optional, in fixes #(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Part of #2295

[codecov]

Codecov Report

Patch coverage: 88.88% and project coverage change: +0.20% 🎉

Comparison is base (eab5a45) 60.54% compared to head (7280671) 60.74%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2376      +/-   ##
==========================================
+ Coverage   60.54%   60.74%   +0.20%     
==========================================
  Files         164      164              
  Lines        9464     9469       +5     
==========================================
+ Hits         5730     5752      +22     
+ Misses       3313     3300      -13     
+ Partials      421      417       -4     

Files Changed	Coverage Δ
controllers/vspheremachine_controller.go	76.55% <88.88%> (+0.43%)	⬆️

... and 8 files with indirect coverage changes

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[k8s-ci-robot]

@Ankitasw: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-vsphere-apidiff-main	7280671	link	false	/test pull-cluster-api-provider-vsphere-apidiff-main

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[Ankitasw]

cc @zhanggbj @chrischdi

[chrischdi]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: fb89731cca6ef2fd9e93b823742bef848f4d6dcd

[chrischdi]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrischdi

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