fix(core): render static pages for all http methods, for options meth…

[dphang]

…ods return allowed methods. This will be in parity with Next.js server as it also renders static pages no matter the request method. Note: only applies if S3 pages are rendered through the Lambda, as for CloudFront -> s3 origin, http method cannot be modified (and we don't want to do it in origin response handler as it will just be inefficient).

[slsnextbot]

Handler Size Report

There are changes to handler sizes. Please review.

Base Handler Sizes (kB) (commit 6d761ff)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1519,
            "Minified": 666
        },
        "Image Lambda": {
            "Standard": 1484,
            "Minified": 800
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1529,
            "Minified": 672
        },
        "Default Lambda V2": {
            "Standard": 1521,
            "Minified": 668
        },
        "API Lambda": {
            "Standard": 632,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1492,
            "Minified": 805
        },
        "Regeneration Lambda": {
            "Standard": 1182,
            "Minified": 543
        },
        "Regeneration Lambda V2": {
            "Standard": 1251,
            "Minified": 571
        }
    }
}

New Handler Sizes (kB) (commit ad7b29b)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1519,
            "Minified": 666
        },
        "Image Lambda": {
            "Standard": 1485,
            "Minified": 800
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1529,
            "Minified": 672
        },
        "Default Lambda V2": {
            "Standard": 1521,
            "Minified": 668
        },
        "API Lambda": {
            "Standard": 632,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1493,
            "Minified": 805
        },
        "Regeneration Lambda": {
            "Standard": 1183,
            "Minified": 544
        },
        "Regeneration Lambda V2": {
            "Standard": 1251,
            "Minified": 571
        }
    }
}

[codecov]

Codecov Report

Merging #2024 (ad7b29b) into master (6d761ff) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2024   +/-   ##
=======================================
  Coverage   83.86%   83.86%           
=======================================
  Files         102      102           
  Lines        3626     3626           
  Branches     1139     1139           
=======================================
  Hits         3041     3041           
  Misses        574      574           
  Partials       11       11           

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[dphang]

Transient test failure