CCSDt' interface (and general EBCC interface updates)

[cjcscott]

Updates the Vayesta interface for solvers from ebcc, adding support for CCSDt' active space solvers. Notable background updates are:

• Added functionality to apply rotations to CCSD wavefunctions and run solver calculations in a rotation of the cluster basis.
• Fixed factor of two conversion between certain spin components of UCCSD T2 amplitudes from ebcc.
• Added tests and examples for using solvers from ebcc (CCSD, CCSDT and CCSDt').

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (583b949) 0.00% compared to head (02dc7f4) 0.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #121    +/-   ##
=======================================
  Coverage    0.00%   0.00%            
=======================================
  Files         139     139            
  Lines       18645   18806   +161     
=======================================
- Misses      18645   18806   +161     

Files Changed	Coverage Δ
vayesta/core/qemb/qemb.py	0.00% <ø> (ø)
vayesta/core/types/wf/ccsd.py	0.00% <0.00%> (ø)
vayesta/core/types/wf/project.py	0.00% <0.00%> (ø)
vayesta/core/types/wf/wf.py	0.00% <0.00%> (ø)
vayesta/ewf/ewf.py	0.00% <0.00%> (ø)
vayesta/ewf/fragment.py	0.00% <0.00%> (ø)
vayesta/ewf/ufragment.py	0.00% <0.00%> (ø)
vayesta/solver/__init__.py	0.00% <0.00%> (ø)
vayesta/solver/ebcc.py	0.00% <0.00%> (ø)
vayesta/solver/hamiltonian.py	0.00% <0.00%> (ø)

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