refactor: use gzip library's compress() and decompress() methods directly

[akhilnarang]

The util methods in framework were added for python2.7 compat, so can be removed

[codecov]

Codecov Report

Merging #37611 (7e11756) into develop (38ca164) will increase coverage by 0.48%.
Report is 108 commits behind head on develop.
The diff coverage is 77.57%.

@@             Coverage Diff             @@
##           develop   #37611      +/-   ##
===========================================
+ Coverage    66.86%   67.35%   +0.48%     
===========================================
  Files          791      757      -34     
  Lines        62519    60124    -2395     
===========================================
- Hits         41805    40497    -1308     
+ Misses       20714    19627    -1087     

Files	Coverage Δ
...account_closing_balance/account_closing_balance.py	97.91% <100.00%> (+4.29%)	⬆️
...xt/accounts/doctype/payment_entry/payment_entry.py	83.77% <100.00%> (+0.08%)	⬆️
...ounts/doctype/purchase_invoice/purchase_invoice.py	83.97% <100.00%> (+0.02%)	⬆️
...xt/accounts/doctype/sales_invoice/sales_invoice.py	83.88% <100.00%> (-0.08%)	⬇️
...nts/doctype/subscription_plan/subscription_plan.py	40.47% <ø> (ø)
erpnext/accounts/doctype/tax_rule/tax_rule.py	93.10% <100.00%> (+1.36%)	⬆️
.../report/accounts_receivable/accounts_receivable.py	90.56% <100.00%> (ø)
...omparison/general_and_payment_ledger_comparison.py	100.00% <100.00%> (ø)
erpnext/controllers/selling_controller.py	80.75% <100.00%> (ø)
erpnext/erpnext_integrations/utils.py	0.00% <ø> (-42.23%)	⬇️
... and 35 more

... and 13 files with indirect coverage changes