Only restart services with goreman if they're running

Created by: mrnugget

When running ./dev/start.sh with a modified Procfile, or passing the --only/--except options to it, the list of running services doesn't match the list of binaries the watch command rebuilds.

So what happens is that you modify code, watch re-compiles the binaries and runs into an error:

08:54:27  watch | Building with optimizations disabled (for debugging). Make sure you have at least go1.10 installed.
08:54:32  watch | Rebuilt: symbols precise-code-intel-bundle-manager precise-code-intel-worker
08:54:32  watch | goreman: unknown proc: symbols

Because symbols wasn't running now all three services aren't restarted.

That cost me a lot of time and caused a ton of facepalms... so here's the fix.

Created by: codecov[bot]

Codecov Report

Merging #12903 into main will increase coverage by 0.32%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #12903      +/-   ##
==========================================
+ Coverage   50.85%   51.17%   +0.32%     
==========================================
  Files        1454     1454              
  Lines       81357    81357              
  Branches     6615     6627      +12     
==========================================
+ Hits        41371    41632     +261     
+ Misses      36404    36142     -262     
- Partials     3582     3583       +1     

Flag	Coverage Δ
#go	52.63% <ø> (+<0.01%)
#integration	24.27% <ø> (ø)
#storybook	14.12% <ø> (?)
#typescript	47.13% <ø> (+1.19%)
#unit	34.70% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/frontend/graphqlbackend/zoekt.go	75.70% <0.00%> (+0.28%)
shared/src/util/url.ts	90.13% <0.00%> (+0.89%)
...c/browser-extension/options-page/ServerUrlForm.tsx	95.55% <0.00%> (+2.22%)
web/src/components/diff/FileDiffHunks.tsx	70.45% <0.00%> (+2.27%)
...d/src/components/activation/ActivationDropdown.tsx	48.57% <0.00%> (+2.85%)
shared/src/util/markdown.ts	80.00% <0.00%> (+3.33%)
...paigns/detail/changesets/ExternalChangesetNode.tsx	52.72% <0.00%> (+3.63%)
...red/src/components/completion/CompletionWidget.tsx	25.00% <0.00%> (+5.00%)
...c/components/completion/EditorCompletionWidget.tsx	5.88% <0.00%> (+5.88%)
web/src/components/FilteredConnection.tsx	79.45% <0.00%> (+8.67%)
... and 22 more