ci: enforce signed tags

[istankovic]

Make sure every tag has a signature. Note that we intentionally do not verify the signature, similarly for commits.

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PR Submission Checklist for internal contributors

• The PR Title
  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[github-actions]

Bencher Report

Branch	ivan/enforce-signed-tags
Testbed	ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	milliseconds (ms)
Commit add f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	18.53
Commit add f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	6.83
Commit add f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	9.42
Commit add f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	11.74
Commit add f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	14.77
Commit add f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	16.66
Commit add f(number clients)/cs1/mem/1002	📈 view plot 🚷 view threshold	982.92
Commit add f(number clients)/cs1/mem/2	📈 view plot 🚷 view threshold	6.84
Commit add f(number clients)/cs1/mem/202	📈 view plot 🚷 view threshold	84.81
Commit add f(number clients)/cs1/mem/402	📈 view plot 🚷 view threshold	220.32
Commit add f(number clients)/cs1/mem/602	📈 view plot 🚷 view threshold	425.12
Commit add f(number clients)/cs1/mem/802	📈 view plot 🚷 view threshold	674.21
Commit pending proposals f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	115.59
Commit pending proposals f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	28.43
Commit pending proposals f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	45.82
Commit pending proposals f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	60.59
Commit pending proposals f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	79.19
Commit pending proposals f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	93.85
Commit pending proposals f(pending size)/cs1/mem/1	📈 view plot 🚷 view threshold	18.57
Commit pending proposals f(pending size)/cs1/mem/101	📈 view plot 🚷 view threshold	114.95
Commit pending proposals f(pending size)/cs1/mem/21	📈 view plot 🚷 view threshold	35.53
Commit pending proposals f(pending size)/cs1/mem/41	📈 view plot 🚷 view threshold	56.27
Commit pending proposals f(pending size)/cs1/mem/61	📈 view plot 🚷 view threshold	75.15
Commit pending proposals f(pending size)/cs1/mem/81	📈 view plot 🚷 view threshold	94.90
Commit remove f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	28.08
Commit remove f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	6.76
Commit remove f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	8.92
Commit remove f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	12.03
Commit remove f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	16.96
Commit remove f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	21.62
Commit remove f(number clients)/cs1/mem/1002	📈 view plot 🚷 view threshold	30.01
Commit remove f(number clients)/cs1/mem/2	📈 view plot 🚷 view threshold	137.40
Commit remove f(number clients)/cs1/mem/202	📈 view plot 🚷 view threshold	114.94
Commit remove f(number clients)/cs1/mem/402	📈 view plot 🚷 view threshold	93.85
Commit remove f(number clients)/cs1/mem/602	📈 view plot 🚷 view threshold	71.80
Commit remove f(number clients)/cs1/mem/802	📈 view plot 🚷 view threshold	50.31
Commit update f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	136.99
Commit update f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	7.01
Commit update f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	33.49
Commit update f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	59.59
Commit update f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	86.76
Commit update f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	111.94

🐰 View full continuous benchmarking report in Bencher