fix: do not double-commit webhooks on registration

[aeneasr]

See https://github.com/ory-corp/cloud/issues/3360

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
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• I have added tests that prove my fix is effective or that my feature
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Further Comments

[codecov]

Codecov Report

Merging #2888 (e7ffa83) into master (b1ff220) will decrease coverage by 0.05%.
The diff coverage is 86.66%.

@@            Coverage Diff             @@
##           master    #2888      +/-   ##
==========================================
- Coverage   75.95%   75.90%   -0.06%     
==========================================
  Files         303      304       +1     
  Lines       18296    18319      +23     
==========================================
+ Hits        13897    13905       +8     
- Misses       3330     3342      +12     
- Partials     1069     1072       +3     

Impacted Files	Coverage Δ
cmd/cliclient/client.go	35.71% <0.00%> (-9.75%)	⬇️
cmd/identities/definitions.go	71.42% <ø> (ø)
cmd/identities/validate.go	62.66% <0.00%> (ø)
examples/go/pkg/common.go	58.62% <ø> (ø)
identity/identity.go	89.94% <ø> (ø)
hydra/fake.go	37.50% <66.66%> (ø)
cmd/identities/delete.go	94.87% <100.00%> (ø)
cmd/identities/get.go	90.19% <100.00%> (ø)
cmd/identities/import.go	76.47% <100.00%> (ø)
cmd/identities/list.go	81.81% <100.00%> (ø)
... and 43 more

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