CSUB-312: Enable try-runtime

[nathanwhit]

Description of proposed changes:
There were a few missing pieces. Still not entirely sure how to use it though.

Practical tips for PR review & merge:

• All GitHub Actions report PASS
• Newly added code/functions have unit tests
  • Coverage tools report all newly added lines as covered
  • The positive scenario is exercised
  • Negative scenarios are exercised, e.g. assert on all possible errors
  • Assert on events triggered if applicable
  • Assert on changes made to storage if applicable
• Modified behavior/functions - try to make sure above test items are covered
• Integration tests are added if applicable/needed

[github-actions]

For full LLVM coverage report click here!

[codecov-commenter]

Codecov Report

Merging #819 (86ef7db) into dev (39fb3ef) will decrease coverage by 0.01%.
The diff coverage is 5.88%.

@@            Coverage Diff             @@
##              dev     #819      +/-   ##
==========================================
- Coverage   78.14%   78.13%   -0.02%     
==========================================
  Files          68       68              
  Lines       10666    10668       +2     
==========================================
  Hits         8335     8335              
- Misses       2331     2333       +2     

Impacted Files	Coverage Δ
node/src/cli.rs	35.71% <ø> (ø)
node/src/command.rs	0.00% <0.00%> (ø)
pallets/creditcoin/src/lib.rs	81.70% <ø> (ø)
pallets/creditcoin/src/migrations/mod.rs	0.00% <ø> (ø)
pallets/creditcoin/src/migrations/v6.rs	89.21% <ø> (ø)
runtime/src/lib.rs	23.78% <6.66%> (ø)

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[atodorov]

Rebased to latest dev!