Refactor ECDSA structs into ec::signature (#654) #126

Job	Run time
GCC 4.8 - CMake 0 - FIPS 0	6m 2s
GCC 7 - CMake 0 - FIPS 0	4m 3s
GCC 4.8 - CMake 0 - FIPS 1	8m 14s
GCC 7 - CMake 0 - FIPS 1	5m 39s
GCC 5 - CMake 0 - FIPS 0	6m 18s
GCC 8 - CMake 0 - FIPS 0	4m 20s
GCC 5 - CMake 0 - FIPS 1	8m 11s
GCC 8 - CMake 0 - FIPS 1	6m 4s
GCC 6 - CMake 0 - FIPS 0	6m 41s
GCC 7 - CMake 1 - FIPS 0	3m 52s
GCC 6 - CMake 0 - FIPS 1	8m 11s
GCC 7 - CMake 1 - FIPS 1	5m 20s
GCC 4.8 - CMake 1 - FIPS 0	7m 2s
GCC 8 - CMake 1 - FIPS 0	4m 11s
GCC 4.8 - CMake 1 - FIPS 1	8m 9s
GCC 8 - CMake 1 - FIPS 1	5m 47s
GCC 5 - CMake 1 - FIPS 0	6m 34s
GCC 5 - CMake 1 - FIPS 1	7m 58s
C-std ubuntu-latest - 11 - Force CMake 0	1m 51s
GCC 6 - CMake 1 - FIPS 0	6m 51s
C-std ubuntu-latest - 11 - Force CMake 1	1m 43s
GCC 6 - CMake 1 - FIPS 1	8m 20s
C-std ubuntu-latest - 99 - Force CMake 0	1m 37s
C-std ubuntu-latest - 99 - Force CMake 1	2m 5s
C-std macos-13 - 11 - Force CMake 0	2m 53s
C-std macos-13 - 11 - Force CMake 1	3m 57s
C-std macos-13 - 99 - Force CMake 0	2m 23s
C-std macos-13 - 99 - Force CMake 1	2m 44s
C-std macos-14-xlarge - 11 - Force CMake 0	1m 22s
C-std macos-14-xlarge - 11 - Force CMake 1	1m 24s
C-std macos-14-xlarge - 99 - Force CMake 0	1m 28s
C-std macos-14-xlarge - 99 - Force CMake 1	1m 26s
C-std windows-latest - 11 - Force CMake 0	3m 38s
C-std windows-latest - 11 - Force CMake 1	3m 12s
C-std windows-latest - 99 - Force CMake 0	3m 58s
C-std windows-latest - 99 - Force CMake 1	3m 37s
	2h 47m 5s

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