Fixing Virgo's arms directions

[tsunhopang]

Correcting the arms' orientations of Virgo within src/jimgw/single_detector/detector.py.

The previous setting is

V1 = GroundBased2G(
    "V1",
    latitude=(43 + 37.0 / 60 + 53.0921 / 3600) * DEG_TO_RAD,
    longitude=(10 + 30.0 / 60 + 16.1887 / 3600) * DEG_TO_RAD,
    xarm_azimuth=243.0 * DEG_TO_RAD,
    yarm_azimuth=333.0 * DEG_TO_RAD,
    xarm_tilt=0,
    yarm_tilt=0,
    elevation=51.884,
    mode="pc",
)

The corrected setting is

V1 = GroundBased2G(
    "V1",
    latitude=(43 + 37.0 / 60 + 53.0921 / 3600) * DEG_TO_RAD,
    longitude=(10 + 30.0 / 60 + 16.1887 / 3600) * DEG_TO_RAD,
    xarm_azimuth=70.5674 * DEG_TO_RAD,
    yarm_azimuth=160.5674 * DEG_TO_RAD,
    xarm_tilt=0,
    yarm_tilt=0,
    elevation=51.884,
    mode="pc",
)

which aligns with bilby's setting and the orientation of Virgo (shown on google map)

[tsunhopang]

The fix should only have a minimal impact on the published results. Since
i) For injection study, the injection and recovery are consistently using the "modified" Virgo
ii) For real events, only GW170817 can be affected. Yet, the SNR in Virgo is minimal as compared to the two LIGO detectors (see here), so the posterior of psi is still minimally impacted.