fix(ux): remove attachment limit from item doctype

[ankush]

limit of 1 is way too low for Item, users would typically want to store item images, cataglog/spec etc on same document.

Also removed limit from:

• quotation
• stock reconciliation

AFAIK We have no reason to restrict how many attachments should be added to these doctypes.

[codecov]

Codecov Report

Merging #28632 (72895fe) into develop (69a17b9) will increase coverage by 0.12%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop   #28632      +/-   ##
===========================================
+ Coverage    55.18%   55.30%   +0.12%     
===========================================
  Files         1120     1121       +1     
  Lines        66673    66746      +73     
===========================================
+ Hits         36791    36913     +122     
+ Misses       29882    29833      -49     

Impacted Files	Coverage Δ
erpnext/regional/saudi_arabia/utils.py	24.05% <0.00%> (-11.51%)	⬇️
erpnext/stock/report/stock_ageing/stock_ageing.py	91.24% <0.00%> (-1.46%)	⬇️
erpnext/assets/doctype/asset/asset.py	74.23% <0.00%> (-1.02%)	⬇️
erpnext/accounts/deferred_revenue.py	75.11% <0.00%> (-0.89%)	⬇️
erpnext/stock/reorder_item.py	76.06% <0.00%> (-0.86%)	⬇️
.../support/report/issue_analytics/issue_analytics.py	88.98% <0.00%> (-0.85%)	⬇️
...stock/doctype/purchase_receipt/purchase_receipt.py	90.29% <0.00%> (-0.27%)	⬇️
erpnext/accounts/utils.py	59.04% <0.00%> (-0.19%)	⬇️
erpnext/hooks.py	0.00% <0.00%> (ø)
erpnext/hr/utils.py	74.29% <0.00%> (ø)
... and 25 more