fix: from time and to time not updated in drag and drop action

[mohammedyusufshaikh]

Before Fix:

The Course Schedule Calendar did not update from time and to time when a drag and drop action is performed in time slots of a day

After Fix:

from time and to time updated correctly so new changes are saved

This issue was identified from here GitHub Issue

There is also a bug identified from this issue which doesn't allow user to drag and drop events to a different date which required a fix in the framework. A PR has been raised for the same #15509

[codecov]

Codecov Report

Merging #29114 (3927c37) into develop (b8c212a) will increase coverage by 11.44%.
The diff coverage is 37.50%.

@@             Coverage Diff              @@
##           develop   #29114       +/-   ##
============================================
+ Coverage    46.54%   57.99%   +11.44%     
============================================
  Files         1128     1110       -18     
  Lines        67333    68007      +674     
============================================
+ Hits         31341    39441     +8100     
+ Misses       35992    28566     -7426     

Impacted Files	Coverage Δ
erpnext/education/api.py	33.51% <ø> (+13.62%)	⬆️
...ucation/doctype/course_schedule/course_schedule.py	83.33% <37.50%> (-13.22%)	⬇️
...e/asset_value_adjustment/asset_value_adjustment.py	86.04% <0.00%> (-3.49%)	⬇️
...ctype/woocommerce_settings/woocommerce_settings.py	80.76% <0.00%> (-3.24%)	⬇️
erpnext/accounts/doctype/party_link/party_link.py	84.00% <0.00%> (-1.72%)	⬇️
erpnext/crm/doctype/opportunity/opportunity.py	70.69% <0.00%> (-0.46%)	⬇️
...ent/doctype/loan_disbursement/loan_disbursement.py	71.42% <0.00%> (-0.27%)	⬇️
erpnext/utilities/transaction_base.py	75.20% <0.00%> (-0.21%)	⬇️
erpnext/hooks.py	0.00% <0.00%> (ø)
erpnext/setup/install.py	0.00% <0.00%> (ø)
... and 389 more