OpenAiEmbeddingModel failes to instantiate unless `embedding-model-dimensions.properties` is manually added to class path

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Bug description
org.springframework.ai.embedding.AbstractEmbeddingModel function loadKnownModelDimensions is called statically to load a properties file classpath:/embedding/embedding-model-dimensions.properties that is not guaranteed to be in the classpath.

It should be possible to:

• Run the system on defaults without externally placing the properties file
• Change the location of the resource
• Override how this resource is defined.

Environment
SpringAI SNAPSHOT-1.0.0

Steps to reproduce
Attempt to instantiate OpenAiEmbeddingModel without manually placing the properties file in the class path.

Expected behavior
N/A

Minimal Complete Reproducible example

def embeddingOptions = OpenAiEmbeddingOptions.builder().withModel("text-embedding-ada-002").build()
def embeddingModel = new OpenAiEmbeddingModel(openAiApi, MetadataMode.EMBED, embeddingOptions)

Start in org.springframework.ai.embedding.AbstractEmbeddingModel and inspect loadKnownModelDimensions, especially how it loads classpath:/embedding/embedding-model-dimensions.properties. Reproduce construction of OpenAiEmbeddingModel with the provided options and verify the behavior when the resource is absent. Done should cover running with defaults and the requested ability to change or override the resource location.