Allow password to be passed to TLS context

[ahopkins]

Closes #2715

if __name__ == "__main__":
    app_loader = AppLoader(factory=factory)
    app = app_loader.load()
    app.prepare(
        host="localhost",
        port=8443,
        ssl={
            "cert": ".../fullchain.pem",
            "key": ".../privkey.pem",
            "password": "password",      # <<<< This line is newly supported
            "names": ["localhost"],
        },
        dev=True,
    )
    Sanic.serve(primary=app, app_loader=app_loader)

[codecov]

Codecov Report

Patch coverage: 100.000% and project coverage change: +0.010 🎉

Comparison is base (5ee36fd) 88.607% compared to head (138752a) 88.617%.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #2719       +/-   ##
=============================================
+ Coverage   88.607%   88.617%   +0.010%     
=============================================
  Files           87        87               
  Lines         6820      6844       +24     
  Branches      1171      1178        +7     
=============================================
+ Hits          6043      6065       +22     
- Misses         535       537        +2     
  Partials       242       242               

Impacted Files	Coverage Δ
sanic/app.py	90.068% <100.000%> (+0.315%)	⬆️
sanic/http/tls/context.py	96.428% <100.000%> (+0.892%)	⬆️
sanic/mixins/startup.py	90.807% <100.000%> (ø)
sanic/response/convenience.py	97.435% <100.000%> (+1.039%)	⬆️

... and 1 file with indirect coverage changes

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