fix(typescript-axios): adds support for anyOf in typescript-axios generator

Created by: vpishuk

Added support to render anyOf schemas into typescript-axios generator. In scope of this MR the following files were modified/added:

• modules/openapi-generator/src/main/resources/typescript-axios/model.mustache extended so it renders modelAnyOf template in case model contains anyOf declaration
• modules/openapi-generator/src/main/resources/typescript-axios/modelAnyOf.mustache a template to render models that contain anyOf declaration. It follows the same pattern as oneOf and allOf declarations.

Exmple of schema that had an issue:

{
    "type": "object",
    "anyOf": [
        {
            "additionalProperties": false,
            "required": ["type"],
            "properties": {
                "type": {
                    "type": "string",
                    "enum": ["audience"]
                },
                "uid": {
                    "type": "string"
                },
                "attributes": {
                    "type": "object",
                    "additionalProperties": false,
                    "properties": {
                        "name": {
                            "type": "string"
                        }
                    }
                }
            }
        },
        {
            "additionalProperties": false,
            "required": ["type"],
            "properties": {
                "type": {
                    "type": "string",
                    "enum": ["creative"]
                },
                "uid": {
                    "type": "string"
                },
                "attributes": {
                    "type": "object",
                    "additionalProperties": false,
                    "properties": {
                        "name": {
                            "type": "string"
                        },
                        "media_type": {
                            "type": "string",
                            "enum": ["video", "banner"]
                        }
                    }
                }
            }
        },
        {
            "additionalProperties": false,
            "required": ["type"],
            "properties": {
                "type": {
                    "type": "string",
                    "enum": ["set"]
                },
                "uid": {
                    "type": "string"
                },
                "attributes": {
                    "type": "object",
                    "additionalProperties": false,
                    "properties": {
                        "name": {
                            "type": "string"
                        },
                        "set_type": {
                            "type": "string",
                            "enum": ["geo.set.postal_code"]
                        },
                        "created_at": {
                            "type": "string"
                        },
                        "updated_at": {
                            "type": "string"
                        }
                    }
                }
            }
        }
    ]
}

@TiFu (2017/07) @taxpon (2017/07) @sebastianhaas (2017/07) @kenisteward (2017/07) @Vrolijkx (2017/09) @macjohnny (2018/01) @topce (2018/10) @akehir (2019/07) @petejohansonxo (2019/11) @amakhrov (2020/02) @davidgamero (2022/03) @mkusaka (2022/04)

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