Allow test scripts for CW codes in LALApps to be written in Python

See merge request lscsoft/lalsuite!1363

Retry conda command in CI to survive HTTP errors

See merge request lscsoft/lalsuite!1366

to minimise the impact of http errors

XLALComputePSDandNormSFTPower: reset *multiPSDVector to NULL if not returned

See merge request lscsoft/lalsuite!1364

CrossCorr Resampling: integrates the resampling code used in the F-statistic into the CrossCorr_v2 search pipeline

See merge request lscsoft/lalsuite!1359

- Important for SWIG wrappings, so that they don't try to destroy *multiPSDVector

lalburst.snglcoinc: python3 fixes

See merge request lscsoft/lalsuite!1326

CFSv2: deprecate old --IFO option

See merge request lscsoft/lalsuite!1361

 -only *required* for ancient v1 SFTs,
  and easy to replace by --DataFiles filter
  for modern v2 SFTs
 -will be removed in future release
 -refs #318

Minor ComputeFstat-related changes

See merge request lscsoft/lalsuite!1358

clarify SFT timestamps convention in CW executables --help

Closes #334

See merge request lscsoft/lalsuite!1362

 -clarify half-open interval SFT timestamps convention
  in --help outputs of various executables
 -cloes #334

 -superfluous or easy to replace with file name filter in each case
 -in testComputeFstatistic_v2_grids.sh also needed to drop archaic
  MFD option --outSFTv1

CW commits for LALSuite release

See merge request lscsoft/lalsuite!1357