[llms] Fix ErrIncompleteEmbeddings Message Typos

[wgeorgecook]

PR Checklist

• [x] Read the Contributing documentation.
• [x] Read the Code of conduct documentation.
• [x] Name your Pull Request title clearly, concisely, and prefixed with the name of the primarily affected package you changed according to Good commit messages (such as memory: add interfaces for X, Y or util: add whizzbang helpers).
• [x] Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• [x] Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. Fixes #123).
• [n/a] Describes the source of new concepts.
• [n/a] References existing implementations as appropriate.
• [n/a] Contains test coverage for new functions.
• [n/a] Passes all golangci-lint checks.

This PR fixes two typos in the ErrIncompleteEmbeddings message. The first is the word no instead of not being incorrectly used. The second removes an extraneous m in the word embedded. I could not find any other PRs for this. I haven't changed any functionality, only the content of the declared error.

[wgeorgecook]

I know this is the smallest, least consequential thing, but I would be greatly appreciative if this could get merged in.

[wgeorgecook]

@tmc There are a lot of redeclared errors across the LLMs and Vectorstores. I could extract all of them into a shared errors package if that's helpful. Otherwise I can take both ErrIncompleteEmbeddings and ErrNoResponse that's shared with these LLMs and make them use a shared error.