test: fix feature_governance.py

[UdjinM6]

Issue being fixed or feature implemented

test/functional/feature_governance.py:205:59: F821 undefined name 'p0_amount'
test/functional/feature_governance.py:205:95: F821 undefined name 'p1_amount'
test/functional/feature_governance.py:205:131: F821 undefined name 'p2_amount'

What was done?

add missing self.

How Has This Been Tested?

run linter and feature_governance.py

Breaking Changes

n/a

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[knst]

tested ACK

Without changes:

2023-10-30T18:02:05.954000Z TestFramework (ERROR): Unexpected exception caught during testing
Traceback (most recent call last):
  File "/home/knst/projects/dash/test/functional/test_framework/test_framework.py", line 155, in main
    self.run_test()
  File "/home/knst/projects/dash/test/functional/feature_governance.py", line 205, in run_test
    payment_amounts_expected = [str(satoshi_round(str(p0_amount))), str(satoshi_round(str(p1_amount))), str(satoshi_round(str(p2_amount)))]
                                                      ^^^^^^^^^
NameError: name 'p0_amount' is not defined

with changes:

2023-10-30T18:08:37.257000Z TestFramework (INFO): Tests successful

[ogabrielides]

utACK

[PastaPastaPasta]

utACK for squash merge