IF: Use string for variant format of fc::dynamic_bitset #159

Job	Run time
Discover Versions	2s
Platform Cache / Discover Platforms	5s
Platform Cache / Build Platforms (none)	4s
Run Build Workflow / Build spring (reproducible)	7m 59s
Run Build Workflow / Build spring (asan)	8m 41s
Run Build Workflow / Build spring (ubsan)	9m 32s
Run Build Workflow / Build spring (asserton)	6m 27s
Run Build Workflow / Build spring (ubuntu22)	6m 48s
Run Build Workflow / Build spring (ubuntu20)	6m 29s
Build deb packages (ubuntu20)	9m 57s
Build deb packages (ubuntu22)	8m 47s
Build deb packages (reproducible)	10m 18s
LR Tests (ubuntu20)	24m 10s
NP Tests (ubuntu20)	7m 17s
Tests (ubuntu20)	4m 27s
LR Tests (ubuntu22)	24m 5s
NP Tests (ubuntu22)	6m 25s
Tests (ubuntu22)	4m 27s
NP Tests (asserton)	6m 21s
LR Tests (asserton)	24m 3s
Tests (asserton)	4m 17s
LR Tests (ubsan)	25m 44s
NP Tests (ubsan)	8m 13s
Tests (ubsan)	5m 36s
LR Tests (ubuntu20repro)	24m 5s
NP Tests (ubuntu20repro)	7m 3s
Tests (asan)	7m 52s
LR Tests (ubuntu22repro)	24m 1s
NP Tests (ubuntu22repro)	6m 26s
Tests (ubuntu20repro)	4m 21s
Tests (ubuntu22repro)	4m 20s
libtester tests (ubuntu22, build-tree)	8m 18s
libtester tests (ubuntu22, make-dev-install)	9m 21s
libtester tests (ubuntu22, deb-install)	4m 25s
All Required Tests Passed	1s
	5h 20m 27s

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