test

Add bm_base64 covering common base64 module APIs (#447) #2391

Job	Run time
ubuntu-latest - 3.11	8m 36s
ubuntu-latest - 3.13	7m 28s
ubuntu-24.04-arm - 3.13	7m 39s
ubuntu-24.04-arm - 3.14	7m 22s
macos-latest - 3.14	7m 0s
ubuntu-24.04-arm - 3.11	7m 33s
ubuntu-latest - 3.14	9m 17s
ubuntu-latest - pypy-3.11	14m 49s
ubuntu-24.04-arm - 3.10	6m 56s
ubuntu-latest - 3.15-dev free-threading	9m 31s
ubuntu-latest - 3.12	8m 34s
ubuntu-latest - 3.15-dev	7m 48s
ubuntu-latest - 3.14 free-threading	8m 27s
ubuntu-24.04-arm - 3.14 free-threading	7m 17s
windows-latest - 3.14	15m 6s
ubuntu-24.04-arm - 3.12	7m 28s
ubuntu-latest - 3.10	7m 12s
	2h 28m 3s

Provide feedback