feat: editable purchase invoice

[GursheenK]

Enable updating selected fields in Purchase Invoice after submit and reposting the accounting entries.

Similar to Editable Sales Invoices - #32625

no-docs

[codecov]

Codecov Report

Merging #37194 (61c6ebb) into develop (f0859ec) will decrease coverage by 0.04%.
Report is 37 commits behind head on develop.
The diff coverage is 97.14%.

❗ Current head 61c6ebb differs from pull request most recent head ed7f67b. Consider uploading reports for the commit ed7f67b to get more accurate results

@@             Coverage Diff             @@
##           develop   #37194      +/-   ##
===========================================
- Coverage    66.76%   66.73%   -0.04%     
===========================================
  Files          793      794       +1     
  Lines        62423    62515      +92     
===========================================
+ Hits         41679    41717      +38     
- Misses       20744    20798      +54     

Files	Coverage Δ
...ounts/doctype/purchase_invoice/purchase_invoice.py	83.95% <100.00%> (+0.28%)	⬆️
...post_accounting_ledger/repost_accounting_ledger.py	100.00% <100.00%> (ø)
...xt/accounts/doctype/sales_invoice/sales_invoice.py	83.95% <100.00%> (+0.07%)	⬆️
erpnext/controllers/accounts_controller.py	85.46% <94.44%> (+0.34%)	⬆️

... and 5 files with indirect coverage changes

[ruthra-kumar]

@GursheenK I've added some logic to remove references on Repost Doctypes upon parent doc deletion, so that it doesn't block document deletion action.

Rest of the changes LGTM 👍

[rtdany10]

@GursheenK @ruthra-kumar backport to v14 as well please?