Adapt RpcClient to recent token method changes (bp #11519)

[mergify]

This is an automated backport of pull request #11519 done by Mergify

Cherry-pick of 17645ee has failed:

On branch mergify/bp/v1.2/pr-11519
Your branch is up to date with 'origin/v1.2'.

You are currently cherry-picking commit 17645ee20.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:

	modified:   account-decoder/src/parse_token.rs

Unmerged paths:
  (use "git add <file>..." to mark resolution)

	both modified:   client/src/rpc_client.rs

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[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #11547 into v1.2 will increase coverage by 0.1%.
The diff coverage is 31.5%.

@@           Coverage Diff            @@
##            v1.2   #11547     +/-   ##
========================================
+ Coverage   81.8%    81.9%   +0.1%     
========================================
  Files        319      319             
  Lines      76120    76032     -88     
========================================
+ Hits       62312    62320      +8     
+ Misses     13808    13712     -96     

[mvines]

@CriesofCarrots - thanks for helping this PR through