Raft state refactoring

[wintersteiger]

This adds the raft state refactoring into separate leadership and membership states. There are two points I'm not happy with that I'll point out in comments.

[ccf-bot]

cwinter_raft_state@37136 aka 20211123.20 vs main ewma over 20 builds from 36681 to 37115

Click to see table

build_id	build_number	tpcc_sgx_cft^	tpcc_sgx_cft_mem	ls_sgx_cft^	ls_sgx_cft_mem	ls_jwt_sgx_cft^	ls_jwt_sgx_cft_mem	ls_js_sgx_cft^	ls_js_sgx_cft_mem	ls_full_js_sgx_cft^	ls_full_js_sgx_cft_mem	ls_js_jwt_sgx_cft^	ls_js_jwt_sgx_cft_mem	Historical query (/s)^	CHAMP put (/s)^	CHAMP get (/s)^	RB put (/s)^	RB get (/s)^
36681	20211112.24	6814.16	9.13613e+07	23931.4	1.7961e+07	4522.95	1.56017e+07	2744.31	1.11453e+07	2426.6	1.0621e+07	1804.86	8.78598e+06	8357.96	1.45506e+06	3.58042e+07	nan	nan
36691	20211115.2	6821.98	9.18856e+07	24285.1	1.7961e+07	4552.6	1.53396e+07	2774.26	1.37667e+07	2387.18	1.0621e+07	1822.87	8.78598e+06	8541.57	1.45495e+06	3.58669e+07	nan	nan
36705	20211116.2	6654.62	9.24099e+07	24537.3	1.7961e+07	4491.25	1.56017e+07	2665.91	1.37667e+07	2425.92	1.0621e+07	1827.7	8.78598e+06	9540.78	1.45175e+06	3.58042e+07	nan	nan
36751	20211117.9	6620.48	9.16235e+07	24006.1	1.90096e+07	4484.49	1.58639e+07	2670.36	1.4291e+07	2378.53	1.08831e+07	1821.28	8.78598e+06	8139.81	1.45083e+06	3.63759e+07	nan	nan
36767	20211117.15	6618.15	9.16235e+07	24019.7	1.76989e+07	4525.01	1.58639e+07	2727.28	1.37667e+07	2438.02	1.0621e+07	1776.82	8.78598e+06	8838.48	1.44847e+06	3.58669e+07	nan	nan
36792	20211118.2	6798.68	9.13613e+07	24277.4	1.82232e+07	4377.3	1.53396e+07	2722.15	1.19317e+07	2434.75	1.0621e+07	1784.24	9.04813e+06	8621.63	1.45837e+06	3.56794e+07	nan	nan
36793	20211118.3	6738.99	9.10992e+07	24440.1	1.84853e+07	6101.31	1.6126e+07	2669.26	1.4291e+07	2407.59	1.27181e+07	2108.75	9.04813e+06	8791.74	1.44929e+06	3.63121e+07	nan	nan
36809	20211118.8	6326.78	9.18856e+07	23525	1.76989e+07	6011.1	1.58639e+07	2742.9	1.21939e+07	2401.77	1.03588e+07	2033.48	9.04813e+06	9275.32	1.45795e+06	3.58042e+07	nan	nan
36816	20211118.10	6589.49	9.13613e+07	24401.1	1.76989e+07	6289.66	1.6126e+07	2696.17	1.35046e+07	2418.3	1.0621e+07	2040.98	9.04813e+06	9310.17	1.45423e+06	3.58663e+07	nan	nan
36844	20211118.19	6528.46	9.21478e+07	23667.4	1.7961e+07	6536.27	1.6126e+07	2702.65	1.0621e+07	2351.17	1.35046e+07	2044.63	9.04813e+06	9090.58	1.47741e+06	3.58663e+07	nan	nan
36860	20211118.24	6760.33	9.18856e+07	24428	1.87475e+07	6474.2	1.6126e+07	2719.47	1.29803e+07	2410.65	1.32424e+07	2052.85	8.78598e+06	8675.68	1.45185e+06	3.58663e+07	nan	nan
36870	20211119.2	6453.2	9.16235e+07	24352.1	1.7961e+07	6341.1	1.6126e+07	2743.24	1.08831e+07	2419.63	1.29803e+07	2087.28	9.04813e+06	8394.76	1.45423e+06	3.66369e+07	nan	nan
36901	20211119.12	6258.02	9.16235e+07	24315.5	1.76989e+07	6091.26	1.58639e+07	2735.77	1.35046e+07	2401.36	1.21939e+07	2090.05	9.31027e+06	9019.86	1.45155e+06	3.58042e+07	nan	nan
36917	20211119.17	6600.76	9.18856e+07	24240.4	1.7961e+07	6442.65	1.6126e+07	2707.54	1.40289e+07	2392.04	1.03588e+07	2088.05	9.04813e+06	9126.41	1.35745e+06	3.58042e+07	861115	9.25432e+06
36938	20211122.2	6601.12	9.16235e+07	24307.2	1.76989e+07	6098.95	1.58639e+07	2737.85	1.4291e+07	2391.3	1.32424e+07	2060.28	9.04813e+06	9025.4	1.37773e+06	3.58669e+07	855039	9.22518e+06
37004	20211122.22	6274.89	9.13613e+07	24096.5	1.7961e+07	6488.44	1.58639e+07	2645.8	1.03588e+07	2432.61	1.0621e+07	2062.16	9.04813e+06	8789.88	1.39594e+06	3.65714e+07	871294	9.21265e+06
37046	20211122.33	6682.39	9.29342e+07	24128	1.7961e+07	6560.71	1.56017e+07	2702.88	1.35046e+07	2439.69	1.03588e+07	2100.17	9.04813e+06	9461.14	1.36797e+06	3.58669e+07	861767	9.27952e+06
37059	20211123.2	6697.96	9.05749e+07	24232.6	1.82232e+07	6490.54	1.58639e+07	2728.74	1.35046e+07	2399.19	1.0621e+07	2039.34	1.19317e+07	9300.07	1.37164e+06	3.58042e+07	846874	9.57009e+06
37061	20211123.3	6681.54	9.05749e+07	24276.2	1.90096e+07	6456.22	1.56017e+07	2736.72	1.35046e+07	2361.27	1.37667e+07	2055.39	8.78598e+06	9040.21	1.37301e+06	3.56174e+07	863401	9.36867e+06
37115	20211123.15	6431.28	9.31964e+07	24069.3	1.76989e+07	6213.44	1.56017e+07	2737.5	1.11453e+07	2393.72	1.37667e+07	2105.04	8.78598e+06	9555.14	1.37081e+06	3.58663e+07	867717	9.30059e+06