Use bulk create for creating the profiles

[prathamesh920]

For creating users, did not add bulk create as we need the created user
for creating profile and to add in the course.
So the course and profile is linked with the user. And bulk create does
not return the primary key, so becomes complex to create profile or add
user to the course.

[pep8speaks]

Hello @prathamesh920! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file yaksh/views.py:

Line 2498:13: E128 continuation line under-indented for visual indent
Line 2508:80: E501 line too long (80 > 79 characters)
Line 2510:80: E501 line too long (83 > 79 characters)

[codecov-io]

Codecov Report

Merging #838 (34c74a8) into master (4756f86) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #838   +/-   ##
=======================================
  Coverage   76.69%   76.69%           
=======================================
  Files          53       53           
  Lines        7684     7689    +5     
  Branches     1166     1166           
=======================================
+ Hits         5893     5897    +4     
- Misses       1408     1409    +1     
  Partials      383      383           

Impacted Files	Coverage Δ
yaksh/views.py	70.73% <100.00%> (+0.12%)	⬆️
api/views.py	75.83% <0.00%> (-0.91%)	⬇️

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