fix interactive plot bug and various warnings (#1504)

+ fix the backend issue for interactive plotting as used in tsview and plot_coherence_matrix, which was introduced in #1503

+ fix the tar.extractall warning in tests/smallbaselineApp, by adding `filter` argument, as required by Python 3.14, and preserve the compatibility for Python 3.11 and older.

+ fix gdal warning in all scripts by adding gdal.UseException()

+ fix the circle ci 'RuntimeError: PROJ: proj_identify: Open of /root/tools/miniforge/share/proj failed', by setting PROJ_LIB and GDAL_DATA env var.