fix: seperate custom field creation for KSA

[rtdany10]

If a company is created where country is Kingdom of Saudi Arabia, the system lazily copies the custom field creation from UAE setup. This PR aims to add only KSA specific fields upon setup.
Closes #29110

[rtdany10]

We will need to run custom field creation patch once more for existing users. (https://github.com/frappe/erpnext/blob/develop/erpnext/patches/v13_0/create_ksa_vat_custom_fields.py)

Will shifting the order in patches.txt suffice?
@deepeshgarg007

[codecov]

Codecov Report

Merging #29175 (2e5f22a) into develop (24fc487) will increase coverage by 0.06%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop   #29175      +/-   ##
===========================================
+ Coverage    55.71%   55.78%   +0.06%     
===========================================
  Files         1107     1107              
  Lines        67359    67371      +12     
===========================================
+ Hits         37532    37582      +50     
+ Misses       29827    29789      -38     

Impacted Files	Coverage Δ
erpnext/regional/saudi_arabia/setup.py	0.00% <0.00%> (ø)
...ctype/woocommerce_settings/woocommerce_settings.py	80.00% <0.00%> (-4.00%)	⬇️
...ctype/accounting_dimension/accounting_dimension.py	64.06% <0.00%> (-1.57%)	⬇️
...e/period_closing_voucher/period_closing_voucher.py	88.23% <0.00%> (-1.48%)	⬇️
erpnext/portal/utils.py	28.98% <0.00%> (-1.45%)	⬇️
...ice_creation_tool/opening_invoice_creation_tool.py	60.95% <0.00%> (-0.69%)	⬇️
...rpnext/stock/report/stock_balance/stock_balance.py	79.16% <0.00%> (-0.60%)	⬇️
...next/accounts/doctype/subscription/subscription.py	81.84% <0.00%> (-0.56%)	⬇️
.../report/accounts_receivable/accounts_receivable.py	68.37% <0.00%> (-0.43%)	⬇️
erpnext/stock/doctype/serial_no/serial_no.py	79.62% <0.00%> (-0.27%)	⬇️
... and 18 more