Ignore `null` values from template checks

[zaalbarxx]

What rule do you want to change? no-raw-text

Does this change cause the rule to produce more or fewer warnings? No.

How will the change be implemented? (New option, new default behavior, etc.)? New behavior, I think

Please provide some example code that this change will affect: https://stackblitz.com/edit/vite-vue2-hlw8rl?file=.eslintrc.js,src%2Fviews%2FAbout.vue,src%2Fviews%2FHome.vue

What does the rule currently do for this code? The rule does not ignore null value in template triggering error

What will the rule do after it's changed? The rule will omit the null values in the templates

Additional context This has previously worked correctly in 0.11.1 version, in 1.0.0 it was already broken. I think it is correct to return null value inside the template, especially when dealing with conditions. I've checked and undefined is being ignored, I think same should also apply for null ?