feat: add manifest content to sbom' metadata

[zvigrinberg]

Description

In order to ease troubleshooting and boost recreation of issues in order to solve them, adding manifest content into sbom metadata field in the sbom json , that is, create two new fields under sbom->metadata.properties -> rhda:manifest:content and rhda:manifest:filename

{
    "bomFormat": "CycloneDX",
    "specVersion": "1.4",
    "version": 1,
    "metadata": {
        "timestamp": "2024-06-13T11:00:18.855Z",
        "component": {
            "group": "example.com",
            "name": "software",
            "version": "v0.0.0",
            "purl": "pkg:golang/example.com/software@v0.0.0",
            "type": "application",
            "bom-ref": "pkg:golang/example.com/software@v0.0.0"
        },
        "properties": [
            {
                "name": "rhda:manifest:content",
                "value": "bW9kdWxlIGV4YW1wbGUuY29tL3NvZnR3YXJlCgoKZ28gMS4yMi40ICAgICAgICAgICAgICAgICAgICAgICAgICAKCgoKCgo="
            },
            {
                "name": "rhda:manifest:filename",
                "value": "go.mod"
            }
        ]
    },
    "components": [
        {
            "group": "example.com",
            "name": "software",
            "version": "v0.0.0",
            "purl": "pkg:golang/example.com/software@v0.0.0",
            "type": "application",
            "bom-ref": "pkg:golang/example.com/software@v0.0.0"
        },
        {
            "name": "go",
            "version": "1.22.4",
            "purl": "pkg:golang/go@1.22.4",
            "type": "library",
            "bom-ref": "pkg:golang/go@1.22.4"
        },
        {
            "name": "toolchain",
            "version": "go1.22.4",
            "purl": "pkg:golang/toolchain@go1.22.4",
            "type": "library",
            "bom-ref": "pkg:golang/toolchain@go1.22.4"
        }
    ],
    "dependencies": [
        {
            "ref": "pkg:golang/example.com/software@v0.0.0",
            "dependsOn": [
                "pkg:golang/go@1.22.4"
            ]
        },
        {
            "ref": "pkg:golang/go@1.22.4",
            "dependsOn": [
                "pkg:golang/toolchain@go1.22.4"
            ]
        },
        {
            "ref": "pkg:golang/toolchain@go1.22.4",
            "dependsOn": []
        }
    ]
}

Checklist

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Additional information

Anything else?